摘要
用N^+离子束将Cr元素混合于Cr4Mo4V钢形成新的表面合金层。通过FeCl_3浸泡试验和在0.1mol/L NaCl醋酸—醋酸钠pH5.9缓冲溶液中的极化试验,考察了抗局部腐蚀(点蚀)的能力;同时在H_2SO_4溶液中考察了抗均匀腐蚀的能力。 对混层作的X射线衍射,TEM和XPS微观分析辩明,这层与基体混合良好的表面合金形成晶粒高度细化的多晶;在混层中有CrN、Cr_2N以及更复杂的N、C等化合物形成。电化学性质的显著变化与这些元素的化合物以高度弥散的形式构成多晶结构的微合金密切相关。
A new surface alloy layer has been prepared by N+ ion beam mixing Cr into Cr4Mo4V bearing steel. The pitting resistance has been examined by an immersion test in the FeCl3 solution and a polarization test in the 0.1M NaCl solution (buffered to PH5.9 with acetic acid and sodium acetate) and the uniform corrosion resistance has been measured in the H2SO4 solution.
The analysis results of X-ray diffraction, TEM and XPS for the intermixed layer demonstrated that the surface alloy layer, excellently mixed with matrix has formed a polycrystalling structure with very fine grains and there are CrN, Cr2N and more complex compounds of G, N in the mixed layer.The marked change of electrochemical behavior has a close relation to the micro-alloy of polycrystalline structure which is formed by the compounds of these elements in highly dispersed manner.
出处
《微细加工技术》
1991年第4期19-25,共7页
Microfabrication Technology
关键词
轴承材料
离子束混合
抗蚀性
CrMOV
Ion beam mixing
Corrosion resistance
Polycrystalline structure
